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net/i40e: fix division by 0

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In function i40e_vsi_config_tc_queue_mapping(), if 'enabled_tcmap' is 0,
'total_tc' might be 0. Then 'total_tc' might be used in a division
by 0 in "qpnum_per_tc = i40e_align_floor(vsi->nb_qps / total_tc)".

Fix it by changing 'total_tc' from 0 to 1 just as func
i40e_vsi_update_queue_mapping() does.

Fixes: 4861cde461 ("i40e: new poll mode driver")
Cc: stable@dpdk.org

Signed-off-by: Yong Wang <wang.yong19@zte.com.cn>
Acked-by: Jingjing Wu <jingjing.wu@intel.com>
This commit is contained in:
Yong Wang 2017-06-23 06:57:47 -04:00 committed by Ferruh Yigit
parent dc66e5fd01
commit b734923ddc
1 changed files with 2 additions and 0 deletions
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2
drivers/net/i40e/i40e_ethdev.c
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@ -4307,6 +4307,8 @@ i40e_vsi_config_tc_queue_mapping(struct i40e_vsi *vsi,
for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++)
if (enabled_tcmap & (1 << i))
total_tc++;
if (total_tc == 0)
total_tc = 1;
vsi->enabled_tc = enabled_tcmap;
/* Number of queues per enabled TC */